You really mean you want to adjust your W-4. A W-2 is the document you get from your employer at tax time. You do not ever fill out or change your W-2. You give your employer a W-4 in order to tell the employer how much tax you want them to withhold from your paychecks. You can choose to have extra money withheld from your paychecks if you want to. Look at Step 4 (c) on the W-4 form.
To make changes to a W-4:
https://turbotax.intuit.com/tax-tools/calculators/w4/
https://www.irs.gov/individuals/tax-withholding-estimator
https://www.irs.gov/pub/irs-pdf/fw4.pdf
And...NO, you cannot claim your spouse as a dependent. A spouse is never claimed as a dependent. You file a joint return with your spouse; you can file a joint return even if one spouse has little or no income.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
